Distribution Of Richardsons Ground Squirrel Colonies In North Dakota And Burrowing Owl Use Of The Ground Squirrel Colonies PDF Download
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Author | : Marsha Ann Sovada |
Publisher | : |
Total Pages | : 16 |
Release | : 2005 |
Genre | : Richardson's ground squirrel |
ISBN | : |
Download Distribution of Richardson's Ground Squirrel Colonies in North Dakota and Burrowing Owl Use of the Ground Squirrel Colonies Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 386 |
Release | : 2005 |
Genre | : |
ISBN | : |
Download Nebraska National Forest (N.F.), Black-tailed Prairie Dog Conservation and Management Book in PDF, ePub and Kindle
Author | : Walter Roy Quanstrom |
Publisher | : |
Total Pages | : 242 |
Release | : 1968 |
Genre | : Ground squirrels |
ISBN | : |
Download Some Aspects of the Ethoecology of Richardson's Ground Squirrel in Eastern North Dakota Book in PDF, ePub and Kindle
Author | : Alberta. Fish and Wildlife Division |
Publisher | : |
Total Pages | : 36 |
Release | : 2003 |
Genre | : Nature |
ISBN | : |
Download Survey Protocol for the Richardson's Ground Squirrel Book in PDF, ePub and Kindle
"Alberta Sustainable Resource Development, Fish & Wildlife, Alberta Conservation Association."
Author | : |
Publisher | : |
Total Pages | : |
Release | : 1991 |
Genre | : |
ISBN | : |
Download Tableaux et sculptures du 19.e siècle à l'époque moderne Book in PDF, ePub and Kindle
Author | : Timothy L. Lewis |
Publisher | : |
Total Pages | : 190 |
Release | : 1988 |
Genre | : |
ISBN | : |
Download Distribution and Population Dynamics of the Franklin's Ground Squirrel Book in PDF, ePub and Kindle
Author | : Fred D. Butcher |
Publisher | : |
Total Pages | : 4 |
Release | : 1936 |
Genre | : Ground squirrels |
ISBN | : |
Download Control of Ground Squirrels and Other Rodents in North Dakota Book in PDF, ePub and Kindle
Author | : Ashley Nicole Fortney |
Publisher | : |
Total Pages | : |
Release | : 2014 |
Genre | : |
ISBN | : |
Download Environmental Factors Affecting the Distribution and Abundance of Richardson???s Ground Squirrels Book in PDF, ePub and Kindle
Author | : Vernon Bailey |
Publisher | : |
Total Pages | : 100 |
Release | : 1893 |
Genre | : Ground squirrels |
ISBN | : |
Download The Prairie Ground Squirrels Or Spermophiles of the Mississippi Valley Book in PDF, ePub and Kindle
Author | : Kristy Lee Sydney Bly |
Publisher | : |
Total Pages | : 226 |
Release | : 2008 |
Genre | : Black-tailed prairie dog |
ISBN | : |
Download Influence of Local and Landscape Characteristics of Prairie Dog Colonies on Burrowing Owl Nest Ecology in South Dakota Book in PDF, ePub and Kindle
In the Great Plains, sylvatic plague (Yersinia pestis), poisoning, and habitat conversion continue to reduce and fragment black-tailed prairie dog (Cynomys ludovicianus) habitat in which burrowing owls (Athene cunicularia) seek shelter and nest sites. Consequently, burrowing owls are experiencing population declines at the periphery of their range. The objective of this research was to evaluate habitat factors affecting a population of burrowing owls at the eastern extent of their range. I modeled hypothesized relationships between nest density (Chapter 2) and colony productivity (Chapter 3) and prairie dog habitat characteristics at two scales on the Bad River Ranches, South Dakota. Colony size, prairie dog and total burrow density, mean nearest neighbor and mean nest-to-colony edge distances, cover of warm-season grasses, and soil texture were variables measured at the colony level. Landscape level variables included the degree of colony isolation and the topographic location of colonies. In Chapter 4, I evaluated the spatial distribution of nests within colonies. Twenty-six prairie dog colonies were surveyed for burrowing owl nests during the 2005 (n =10) and 2006 (n = 16) breeding seasons. I evaluated competing models of nest density using a likelihood cross-validation approach. The model selection results in Chapter 2 suggested the top a priori predictor of nest density was colony size. Nest density was greatest on small colonies (20 ha) and lowest on large colonies (40 ha); in contrast, owl numbers were higher on large colonies. Exploratory analysis identified the interaction between cover of bare ground and colony habitat as the best approximating model of nest density. In Chapter 3, competing models of colony productivity were assessed. Although an additive model containing the degree of isolation, habitat, and colony size had a positive effect on colony productivity, exploratory analysis suggested colony size and the degree of isolation had the strongest influence. In Chapter 4, results showed that owls displayed a strong preference for nesting near colony perimeters, but this did not translate to higher productivity. The associations I observed lend support for the value of maintaining prairie dog colonies to ensure the persistence of burrowing owl populations in the Great Plains ecosystem.